Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Master Switch Test
With ignition off, remove master switch. Leave electrical connector connected. With DVOM connected to ground, backprobe and measure voltage at indicated switch terminals with switch in specified positions. See MASTER SWITCH TESTING TABLE. If voltage is as specified, go to appropriate procedure under TROUBLE SHOOTING , if applicable. If voltage is not as specified, replace master switch.
| Switch Position | Wire Color | (1) Volts | ||
|---|---|---|---|---|
| Left Up | GRN/BLU | 12 | ||
| Left Up | RED/BLU | 0 | ||
| Left Up | GRN/WHT | 0 | ||
| Left Up | RED/WHT | 0 | ||
| Left Down | GRN/BLU | 0 | ||
| Left Up | RED/BLU | 12 | ||
| Left Up | GRN/WHT | 0 | ||
| Left Up | RED/WHT | 0 | ||
| Left One-Touch | GRN/BLU | 0 | ||
| Left Up | RED/BLU | 12 | ||
| Left Up | GRN/WHT | 0 | ||
| Left Up | RED/WHT | 0 | ||
| Right Up | GRN/BLU | 0 | ||
| Left Up | RED/BLU | 0 | ||
| Left Up | GRN/WHT | 12 | ||
| Left Up | RED/WHT | 0 | ||
| Right Down | GRN/BLU | 0 | ||
| Left Up | RED/BLU | 0 | ||
| Left Up | GRN/WHT | 0 | ||
| Left Up | RED/WHT | 12 | ||
| Right One-Touch | GRN/BLU | 0 | ||
| Left Up | RED/BLU | 0 | ||
| Left Up | GRN/WHT | 0 | ||
| Left Up | RED/WHT | 12 | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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